KR101970088B1 - Display screen and method of driving the same - Google Patents

Display screen and method of driving the same Download PDF

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Publication number
KR101970088B1
KR101970088B1 KR1020177021125A KR20177021125A KR101970088B1 KR 101970088 B1 KR101970088 B1 KR 101970088B1 KR 1020177021125 A KR1020177021125 A KR 1020177021125A KR 20177021125 A KR20177021125 A KR 20177021125A KR 101970088 B1 KR101970088 B1 KR 101970088B1
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South Korea
Prior art keywords
pixel
subpixel
subpixels
display
driving circuit
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KR1020177021125A
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Korean (ko)
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KR20170102906A (en
Inventor
신고 가와시마
시우지안 주
시아오자오 주
롱 왕
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쿤산 고-비젼녹스 옵토-일렉트로닉스 씨오., 엘티디.
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2003—Display of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0465—Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

Abstract

A display screen and a driving method thereof are disclosed. The display screen comprises a pixel structure and a pixel drive circuit, wherein the pixel structure comprises a plurality of pixel groups (10), each pixel group (10) comprising two or more pixel units (100) The unit 100 includes a first subpixel 110, a second subpixel 120 and a third subpixel 130, wherein each of the first subpixel 110 and the second subpixel 120 And each of the third subpixels 130 in the same pixel group 10 is connected to the same third pixel driving circuit. The plurality of third subpixels 130 in the same pixel group 10 on the display screen are driven by the third pixel driving circuit using the same luminance data to save the number of pixel driving circuits, .

Description

Display screen and method of driving the same

FIELD OF THE INVENTION The present invention relates to the field of flat panel display technology, and more particularly to a method of driving a display and a display.

With advances in technology, there is an increasing demand from users for displays with higher resolution. PPI (pixels per inch) can be used to measure the display resolution. According to the display principle, each sub-pixel in the pixel unit must be driven by the pixel driving circuit to emit light. As a result, in addition to accommodating more pixel units per unit area, it is also necessary to arrange more pixel drive circuits to improve pixel resolution.

For example, there is a conventional display with RGB subpixels arranged together. To achieve a resolution greater than 500 ppi, the pixel unit size should be less than 51 × 51 (μm) and the subpixel size should be less than 17 × 51 (μm). Considering that a pixel circuit is typically composed of a number of thin film transistors (TFTs) and capacitances (e.g., a 6T2C circuit), fabricating a pixel drive circuit that matches subpixels of size less than 17x51 It is usually difficult.

Based on the above, there is a need to provide a display in which the number of pixel driving circuits is reduced compared to conventional circuits.

A method of driving a display is also provided.

The display includes a pixel structure and a pixel driving circuit. The pixel structure includes a plurality of pixel groups, and each pixel group includes two or more pixel units. The pixel unit includes a first subpixel, a second subpixel, and a third subpixel. Each of the first subpixels is connected to a first pixel driving circuit, each of the second subpixels is connected to a second pixel driving circuit, and all third subpixels in one pixel group are connected to the same third pixel driving circuit .

In one embodiment, the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

In one embodiment, the emissive layer material of the blue subpixel is shared by the transport or barrier layer of the red subpixel and the transport or barrier layer of the green subpixel.

In one embodiment, the first subpixel and the second subpixel in one group of pixels are arranged in rows and columns.

In one embodiment, all the third subpixels in one pixel group are connected to each other.

In one embodiment, the third pixel driving circuit receives the luminance data of all the third subpixels in one pixel group connected to the third pixel driving circuit, and drives all the third subpixels based on the average luminance of the luminance data .

In one embodiment, any two of the pixel groups have the same structure.

A method of driving a display includes:

Dividing a pixel structure of a display into a plurality of pixel groups, each pixel group comprising two or more pixel units, wherein the pixel unit comprises a first subpixel, a second subpixel and a third subpixel; ,

Each of the first sub-pixels is coupled to a first pixel drive circuit and each of the second sub-pixels is coupled to a second pixel drive circuit, wherein each of the first pixel drive circuit and the second pixel drive circuit is coupled to a first sub- And luminance data of the second subpixel, respectively, driving the first and second subpixels based on the luminance data,

Connecting all the third subpixels in one pixel group to the same third pixel driving circuit - the third pixel driving circuit receives the luminance data of all the connected third subpixels in one pixel group, and according to a predetermined rule Calculating the output luminance, and driving all the third sub-pixels based on the output luminance.

In one embodiment, the predetermined rule is to calculate an average value.

In one embodiment, all third sub-pixels within one pixel group are connected to each other.

In the above display and its driving method, a plurality of third subpixels in one pixel group can be driven by the same third pixel driving circuit based on the same luminance data, which reduces the number of pixel driving circuits, Thereby enabling pixel driving.

1 is a schematic diagram of a structure of a pixel group and a corresponding pixel driving circuit.
2 is a schematic diagram of a structure of a pixel group and a corresponding pixel driving circuit according to the first embodiment.
Figs. 3A to 3D are schematic diagrams of a structure of four pixel groups and a corresponding pixel driving circuit according to the second embodiment. Fig.
4 is a schematic diagram of a structure of a pixel group and a corresponding pixel driving circuit according to a third embodiment.

Embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and embodiments.

The display includes a pixel structure and a pixel driving circuit. The pixel structure includes a plurality of pixel groups, and each pixel group includes two or more pixel units. The pixel unit includes a first subpixel, a second subpixel, and a third subpixel. The pixel driving circuit includes a plurality of first pixel driving circuits, a second pixel driving circuit, and a third pixel driving circuit. 1 is a schematic diagram of a structure of a pixel group and a corresponding pixel driving circuit. The pixel group 10 includes four pixel units 100 and each pixel unit 100 includes a first subpixel 110, a second subpixel 120 and a third subpixel 130 do. Each of the first sub pixel 110 and the second sub pixel 120 is connected to the first pixel driving circuit and the second pixel driving circuit, respectively. On the other hand, all the third subpixels 130 in the pixel group 10 are connected to the same third pixel driving circuit.

1, the first subpixel 110 is a red subpixel R, the second subpixel 120 is a green subpixel G, the third subpixel is a blue subpixel R, Pixel (B). Each of the red subpixels R in the pixel group is connected to an R pixel driving circuit, each of the green subpixels G in the pixel group is connected to a G pixel driving circuit, And is connected to the same B pixel driving circuit. The blue subpixel B may be deposited using a shadow mask only at the location of the blue subpixel or over the entire location of the pixel group, or it may be entire surface deposited using an open mask over the location of the pixel structure. Note that the blue sub-pixel B is connected to the B-pixel driving circuit by a group of pixels, regardless of the manner in which the blue sub-pixel B is deposited. That is, all the blue subpixels B in one pixel group are connected to the same B pixel driving circuit.

A method of driving a display includes:

Dividing a pixel structure of a display into a plurality of pixel groups, each pixel group comprising two or more pixel units, wherein the pixel unit comprises a first subpixel, a second subpixel and a third subpixel; ,

Each of the first sub-pixels is coupled to a first pixel drive circuit and each of the second sub-pixels is coupled to a second pixel drive circuit, wherein each of the first pixel drive circuit and the second pixel drive circuit is coupled to a first sub- And luminance data of the second subpixel, respectively, driving the first and second subpixels based on the luminance data,

The third pixel driving circuit receives the luminance data of the connected third subpixel, calculates the output luminance according to a predetermined rule, and outputs the output luminance of the third subpixel, And driving all third sub-pixels based on the luminance. Preferably, the predetermined rule is to calculate an average value. That is, all of the received luminance data is summed to calculate the average value used to drive all the third subpixels 130.

According to studies on human visual characteristics, there are three types of cones in the human eye, sensitive to red light, green light and blue light, respectively. The relative density of the cones is different, and the number of blue cones (only about 6%) is much less than the other two. As a result, the ability of the human eye to distinguish colors depends on the different colors. The distinction angle of blue is about 0.25 deg., And the discrimination angle of red or green is about 0.12 deg. For example, below a 30 cm horizontal line, 0.25 deg. Corresponds to a distance of 1270 [mu] m on the display. If the blue pixel spacing is less than half the distance (i.e., 625 um), the colors will blend without loss of image quality. Therefore, even if the resolution of the blue light is reduced many times, it may not affect the human eye sensation on the quality. Thus, depending on the degree of darkness of the human eye with respect to blue, the same pixel drive circuit using the same luminance data can be used to drive a large number of blue subpixels in the same pixel group, and the quality may not be substantially impaired . In this way, the pixel driving circuit can be saved to create a condition for high resolution pixel driving.

Further, the light emitting layer material of the blue subpixel is shared by the transfer layer or the barrier layer of the red subpixel and the transfer layer or the barrier layer of the green subpixel. Thus, more space in the display can be used to improve pixel resolution.

In addition, the first subpixel 110 and the second subpixel 120 in the pixel group 10 are arranged in rows and columns. For example, four pixel units 100 may include four of the first subpixels 110 and four of the second subpixels 120, and eight subpixels may include 2 x 4 can be formed. The third subpixel 130 needs to be in a fixed position as long as it constitutes the complete pixel unit 100 with four of the corresponding first subpixel 110 and second subpixel 120 to display the color There is no.

Further, all the third subpixels 130 in the pixel group 10 may be connected to each other, separated from each other, or may be a single surface.

To facilitate fabrication, any two of the pixel groups of the display have the same structure.

The pixel structure of the display and the corresponding pixel driving circuit together with the driving method of the display are described in detail with reference to various pixel structures as an example.

Fig. 2 shows a pixel structure and a corresponding pixel driving circuit of the first embodiment. The pixel group has two red subpixels and two green subpixels. Each of the red subpixel and the green subpixel corresponds to a pixel driving circuit (for example, a 6T1C circuit). The number and position of the blue subpixels are not fixed as long as there is a pair of red subpixels constituting the pixel unit and one blue subpixel for the green subpixel. In an embodiment, all the blue subpixels of one pixel group are connected together. It can be seen that the blue subpixels of one pixel group may not be connected together, but are deposited individually in the pixel unit. Regardless of the arrangement of the blue subpixels, all blue subpixels at different locations within the pixel group are connected to one pixel drive circuit through the anode. There are five pixel drive circuits in the pixel group and one less pixel drive circuit than a conventional RGB pixel configuration in the same position with six pixel drive circuits.

The pixel structure of the embodiment includes a plurality of groups of pixels as described above, and a display including the above pixel structure and the pixel driving circuit is provided in the embodiment.

In this embodiment, a driving method for a display is provided,

The method comprising: dividing a pixel structure of a display into a plurality of pixel groups, each pixel group comprising two or more pixel units, wherein the pixel unit comprises red subpixels, green subpixels and blue subpixels;

Each of the red subpixels is connected to a red pixel driving circuit, and each of the green subpixels is connected to a green pixel driving circuit. Each of the red pixel driving circuit and the green pixel driving circuit is connected to the red And driving the red subpixel and the green subpixel based on the luminance data,

The blue pixel driving circuit receives the luminance data of the connected blue subpixel, calculates the output luminance according to a predetermined rule, and based on the output luminance, And driving all the blue subpixels. Preferably, the predetermined rule is to calculate an average value. That is, all of the received luminance data is summed to calculate the average value used to drive all the blue subpixels.

Figs. 3A to 3D show a pixel structure and corresponding pixel driving circuit of four types of pixel groups in the second embodiment. Fig. In the embodiment, as shown in Figs. 3A to 3D, there are four pixel units in the pixel group. That is, the pixel unit has four red subpixels and four green subpixels. Each of the red subpixel and the green subpixel corresponds to a pixel driving circuit (for example, a 6T1C circuit). The number and position of blue subpixels are not fixed as long as there is a pair of red subpixels constituting a pixel unit and one blue subpixel for green subpixels. In an embodiment, all the blue subpixels of one pixel group are connected together. It can be seen that the blue subpixels of one pixel group may not be connected to each other, but may be deposited individually on the pixel unit or entire surface of the pixel group.

Figs. 3A to 3D show a case in which blue subpixels have four different positions and numbers. In Figures 3a and 3c, there are two blue subpixels that are independent of each other, and each blue subpixel is matched with two pairs of red and green subpixels arranged in a row. Regardless of the arrangement of the blue subpixels, all the blue subpixels at different locations of the pixel group are connected to one pixel driving circuit through the anode. In FIGS. 3b and 3d, two blue subpixels formed by connecting independent blue subpixels to different positions are connected to each other based on the structure of FIG. 3a or FIG. 3c. The connection portion may be made of a material of blue subpixels. There are nine pixel drive circuits in the pixel group and three fewer pixel drive circuits than a conventional RGB pixel configuration in the same position with 12 pixel drive circuits.

The pixel structure of the present embodiment includes a plurality of groups of pixels as described above, and a display including the above pixel structure and pixel driving circuit is provided in the embodiment.

In this embodiment, a driving method for a display similar to that of the first embodiment is provided, and will not be repeated here.

Fig. 4 shows a pixel structure and corresponding pixel driving circuit of the pixel group of the third embodiment. There are more pixel units in the pixel group of the embodiment. As shown in Fig. 4, the pixel unit has 16 red subpixels and 16 green subpixels. Each of the red subpixel and the green subpixel corresponds to a pixel driving circuit (for example, a 6T1C circuit). The number and position of the blue subpixels are not fixed as long as there is a pair of red subpixels constituting the pixel unit and one blue subpixel for the green subpixel. In an embodiment, all the blue subpixels of one pixel group are connected together. It can be seen that the blue subpixels of one pixel group may not be connected to each other, but may be deposited individually on the pixel unit or entire surface of the pixel group. Regardless of the arrangement of the blue subpixels, all the blue subpixels at different locations within the pixel group are connected to the same pixel drive circuit through the anode. There are 33 pixel drive circuits in the pixel group and 15 pixel drive circuits are less than the configuration of RGB pixels in the same conventional position with 48 pixel drive circuits.

The pixel structure of the embodiment includes a plurality of groups of pixels as described above, and a display including the above pixel structure and the pixel driving circuit is provided in the embodiment.

In this embodiment, a driving method for a display similar to that of the first embodiment is provided, and will not be repeated here.

It is to be understood that there are n red subpixels and n green subpixels in one pixel group, and n may be an integer greater than one. Therefore, it is possible to reduce the number of pixel drive circuits by n-1 from the conventional configuration of RGB pixels at the same position.

In the examples and figures, a technical scheme is shown in which the first subpixel is a red subpixel, the second subpixel is a green subpixel, and the third subpixel is a blue subpixel. However, the present invention is not limited thereto. For example, the first subpixel may be a green or blue subpixel, the second subpixel may be a red or blue subpixel, and the third subpixel may be a red or green subpixel.

In summary, in the above display and its driving method, a plurality of third sub-pixels in one pixel group can be driven by the same pixel driving circuit based on the same luminance data, thereby reducing the number of pixel driving circuits, Resolution pixel driving.

The foregoing is a detailed description of the embodiments of the invention and is not to be construed as limiting the scope of the invention. It should be understood that modifications and improvements will become apparent to those skilled in the art to which the invention pertains without departing from the spirit and scope of the invention. Accordingly, the scope of the present disclosure is defined by the appended claims.

Claims (10)

A display comprising a pixel structure and a pixel drive circuit,
Wherein the pixel structure comprises a plurality of pixel groups, each pixel group comprising two or more pixel units, the pixel unit comprising a first subpixel, a second subpixel and a third subpixel,
Wherein each of the first subpixels is coupled to a first pixel drive circuit, each of the second subpixels is coupled to a second pixel drive circuit, and all the third subpixels in a pixel group are connected to the same third pixel Connected to the driving circuit,
The third pixel driving circuit receives the luminance data of all the third subpixels in one pixel group connected to the third pixel driving circuit and drives all the third subpixels based on the average luminance of the luminance data It is configured to
display.
The method according to claim 1,
The first subpixel is a red subpixel, the second subpixel is a green subpixel, and the third subpixel is a blue subpixel
display.
3. The method of claim 2,
The emissive layer material of the blue subpixel is shared by the transport or barrier layer of the red subpixel and the transport or barrier layer of the green subpixel
display.
The method according to claim 1,
The first subpixel and the second subpixel in one pixel group are arranged in rows and columns
display.
The method according to claim 1,
All of the third subpixels in one pixel group are connected to each other
display.
The method according to claim 1,
Wherein any two of the pixel groups have the same structure
display.
A method of driving a display,
The method comprising: dividing a pixel structure of a display into a plurality of pixel groups, each pixel group comprising two or more pixel units, the pixel unit comprising a first subpixel, a second subpixel and a third subpixel, Wow,
Each of the first sub-pixels is connected to a first pixel driving circuit and each of the second sub-pixels is connected to a second pixel driving circuit, wherein each of the first pixel driving circuit and the second pixel driving circuit comprises: Receiving the luminance data of the first subpixel and the second subpixel, respectively, driving the first subpixel and the second subpixel based on the luminance data,
And the third pixel driving circuit receives the luminance data of all the connected third subpixels in the one pixel group, and the third pixel driving circuit receives the luminance data of all the connected third subpixels in the one pixel group, Calculating an output luminance according to a set rule, and driving all the third sub-pixels based on the output luminance,
The predetermined rule is to calculate an average value
Display driving method.
8. The method of claim 7,
All the third subpixels in the one pixel group are connected to each other
Display driving method. delete delete
KR1020177021125A 2014-12-30 2015-12-24 Display screen and method of driving the same KR101970088B1 (en)

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CN201410842032.6A CN104464541B (en) 2014-12-30 2014-12-30 Display screen and its driving method
CN201410842032.6 2014-12-30
PCT/CN2015/098725 WO2016107492A1 (en) 2014-12-30 2015-12-24 Display screen and drive method therefor

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